Martinsburg
West Virginia, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Martinsburg, West VA

December, the first month of the winter, in Martinsburg, is still a chilly month, with average temperature ranging between max 42.8°F (6°C) and min 25.5°F (-3.6°C).

Temperature

In December, the average high-temperature decreases, from a cool 54.3°F (12.4°C) in November, to a frosty 42.8°F (6°C). In December, the average low-temperature is 25.5°F (-3.6°C).

Rainfall

In Martinsburg, it is raining for 9.1 days, with typically 2.6" (66.8mm) of accumulated precipitation. In Martinsburg, during the entire year, the rain falls for 117.5 days and collects up to 38.6" (980.6mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall.

Daylight

The month with the shortest days is December, with an average of 9.4h of daylight.

Sunshine

January, November and December, with an average of 4h of sunshine, are months with the least sunshine in Martinsburg.

UV index

January, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Martinsburg. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to the Sun's UV rays for ordinary individuals.
The average daily UV index of 2 in December transform into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in December in Martinsburg?

The average high-temperature, in December, is 42.8°F (6°C), while the average low-temperature is 25.5°F (-3.6°C).

How many days does it rain in December in Martinsburg?

In December, the rain falls for 9.1 days. Throughout December, 2.6" (66.8mm) of precipitation is accumulated.

How many days does it snow in December in Martinsburg?

In Martinsburg, West Virginia, in December, during 2.1 snowfall days, 3.8" (96.5mm) of snow is typically accumulated.

What is the month with the shortest days in Martinsburg?

The month with the shortest days in Martinsburg is December, with an average of 9.4h of daylight.

How many hours of daylight does Martinsburg have in December?

In Martinsburg, West Virginia, the average length of the day in December is 9.4h.

What is the month with the least sunshine in Martinsburg?

January, November and December, with an average of 4h of sunshine, are months with the least sunshine in Martinsburg, West Virginia.

How long on average sun shines in December in Martinsburg?

In December, the average sunshine in Martinsburg, West Virginia, is 4h.

When is the lowest UV index in Martinsburg?

January, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Martinsburg, West Virginia.

What is the UV index reading in December in Martinsburg?

The average daily maximum UV index in December in Martinsburg is 2. A UV Index estimate of 2, and below, represents a low health risk from the exposure to the Sun's UV radiation.
Average temperature in December - Martinsburg, West VA
  • Average high temperature in December: 42.8°F

The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is January (39.5°F).

  • Average low temperature in December: 25.5°F

The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (22.3°F).

Average rainfall in December - Martinsburg, West VA
  • Average rainfall in December: 2.6"

The wettest month (with the highest rainfall) is May (4.1").
The driest month (with the lowest rainfall) is February (2.3").

Average rainfall days in December - Martinsburg, West VA
  • Average rainfall days in December: 9.1 days

The month with the highest number of rainy days is May (12.6 days).
The month with the lowest number of rainy days is October (8.5 days).

Average snowfall in December - Martinsburg, West VA
  • Average snowfall in December: 3.8"

The month with the highest snowfall is January (9.3").
Months with the lowest snowfall are May, June, July, August, September and October (0").

Average snowfall days in December - Martinsburg, West VA
  • Average snowfall days in December: 2.1 days

The month with the highest number of snowfall days is January (3.7 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

Average daylight in December / Average sunshine in December - Martinsburg, West VA
  • Average daylight in December: 9.4h

The month with the longest days is June (Average daylight: 14.9h).
The month with shortest days is December (Average daylight: 9.4h).

  • Average sunshine in December: 4h

Months with most sunshine are June and July (Average sunshine: 9h).
Months with least sunshine are January, November and December (Average sunshine: 4).

Average UV index in December - Martinsburg, West VA
  • Average UV index in December: 2

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January, November and December (UV index 2).